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P vs. LT

Grabber70Mach

Grabber70Mach

Well-Known Member
I have a 2004 F150 Supercrew, it came with P255 tires which have been previously replaced with P275 tires. Since I need to replace the tires and plan to occasionally tow a car trailer, should I look at getting LT tires or stick with the P tires?
 
you really need to determine the weight that will be on the back axle of the truck. Too many people overload the tires when towing. We have had much better luck in the arena of durability with the LT tires, even though they tend to ride much stiffer. You can find certain sizes of P tires that have a slightly higher weight rating than the same tire in a different size.
 
I would not haul anything of any weight in a truck without LT tires. Just a peace of mind thing....
 
"AzPete" said:
I would not haul anything of any weight in a truck without LT tires. Just a peace of mind thing....
Click to expand...

While I would agree with you in general...there are a few exceptions to the rule. Properly rated P tires and a good weight distributing hitch will make it work well with in good margin of safety.
 
If you're looking at sticking with the 275's, good luck finding an LT class tire. I have 275/60-17's on my 2001 F150. They're what originally came on it. As far as I can find, no one makes a 275 other than "P" class tires. Even Michelin (which is my preferred brand for my vehicles), only offer "P" class tires under their light truck listings for a 275 tire.
 
Without getting into the differences between a "Light Truck" and "Passenger" tire if you are concerned about tire sizes then use this. http://www.miata.net/garage/tirecalc.html or this http://www.1010tires.com/tiresizecalculator.asp

That is just a general guide. Researching the tires for my 07 GT I used tire racks website http://www.tirerack.com/went to the tire I was considering and looked at the "spec" (specifications) for the tire. A lot of good info there, but the spec I liked the best was the revolution per mile. I went from the factory tire of 235-50R18 to a 275-45R18. Wider tire that will fit on my rim and a difference of 10 to 12 revolutions per mile. I just had them mounted, and got the last tire back yesterday. Had to get the rim repaired due to an encounter with a curb. :rant But it looks like new now. :yah

Point is the internet is your friend when it comes to changing tire sizes.

fd
 
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